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2nd Semester Exam Review
Test Description: 2nd semester Exam Review
Instructions: Answer all questions to get your test result.
1) The actual yield of a product is
A
independent of the reactants
B
a negative value
C
measured experimentally
D
the same as the theoretical yield
2) Percent yield of a product is a measure of a reaction's
A
spontaneity
B
rate
C
efficiency
D
heat production
3) In a reaction, substances A and B form substance C. If the actual mole ratio of substance B to substance A is less than the balanced equation mole ratio of substance B to substance A, substance B is
A
limiting reactant
B
excess reactant
C
product
D
actual yield
4) Limiting a reactant is often accomplished by
A
slowing down a chemical reaction
B
producing excess product
C
overcoming conservation of mass
D
using an excess of another reactant
5) Calculating the mass of a reactant and product from the number of moles of another product or reactant in a chemical equation is an example of a
A
mass-to-mole conversion
B
mass-to-mass conversion
C
mole-to-mass conversion
D
mole-to-mole conversion
6) In the decomposition reaction of compound AB into substances A and B, what is the number of mole ratios?
A
6
B
1
C
9
D
3
7) Mole ratios for a reaction are obtained from the
A
molar masses
B
periodic table
C
total mass of products
D
balanced chemical equation
8) In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by the
A
subscripts
B
molar masses
C
coefficients
D
chemical symbols
9) Stoichiometry is based on the law of conservation of
A
reactants
B
volume
C
charge
D
mass
10) The SI unit of molar mass is the
A
gram
B
gram/mole
C
mole/gram
D
mole
*select an answer for all questions
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